<form enctype="multipart/form-data" method="post" action="/user/add">
	<label>Username:</label> <input type="text" name="username" size="40" />
	<label>Password:</label><input type="password" name="password" size="40" /> 
	<label>ScreenName:</label><input type="text"name="screenname" size="40"> 
	<label>Avatar</label><input type="file" name="avatar" size="40"> 
	<input type="submit" value="Registrer">
</form>